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https://github.com/brain-hackers/u-boot-brain
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8729b1ae2c
At present these functions return 0 on success. For some devices we want to know how many bytes were transferred. It seems useful to adjust the API to be more like the POSIX read() and write() functions. Update these two methods, a test and all users. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*/
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <errno.h>
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#include <misc.h>
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#include <linux/time.h>
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#include <asm/io.h>
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struct altera_sysid_regs {
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u32 id; /* The system build id */
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u32 timestamp; /* Timestamp */
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};
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struct altera_sysid_platdata {
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struct altera_sysid_regs *regs;
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};
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void display_sysid(void)
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{
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struct udevice *dev;
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u32 sysid[2];
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struct tm t;
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char asc[32];
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time_t stamp;
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int ret;
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/* the first misc device will be used */
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ret = uclass_first_device_err(UCLASS_MISC, &dev);
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if (ret)
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return;
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ret = misc_read(dev, 0, &sysid, sizeof(sysid));
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if (ret < 0)
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return;
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stamp = sysid[1];
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localtime_r(&stamp, &t);
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asctime_r(&t, asc);
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printf("SYSID: %08x, %s", sysid[0], asc);
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}
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int do_sysid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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display_sysid();
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return 0;
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}
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U_BOOT_CMD(
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sysid, 1, 1, do_sysid,
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"display Nios-II system id",
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""
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);
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static int altera_sysid_read(struct udevice *dev,
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int offset, void *buf, int size)
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{
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struct altera_sysid_platdata *plat = dev->platdata;
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struct altera_sysid_regs *const regs = plat->regs;
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u32 *sysid = buf;
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sysid[0] = readl(®s->id);
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sysid[1] = readl(®s->timestamp);
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return 0;
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}
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static int altera_sysid_ofdata_to_platdata(struct udevice *dev)
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{
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struct altera_sysid_platdata *plat = dev_get_platdata(dev);
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plat->regs = map_physmem(devfdt_get_addr(dev),
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sizeof(struct altera_sysid_regs),
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MAP_NOCACHE);
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return 0;
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}
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static const struct misc_ops altera_sysid_ops = {
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.read = altera_sysid_read,
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};
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static const struct udevice_id altera_sysid_ids[] = {
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{ .compatible = "altr,sysid-1.0" },
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{}
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};
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U_BOOT_DRIVER(altera_sysid) = {
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.name = "altera_sysid",
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.id = UCLASS_MISC,
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.of_match = altera_sysid_ids,
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.ofdata_to_platdata = altera_sysid_ofdata_to_platdata,
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.platdata_auto_alloc_size = sizeof(struct altera_sysid_platdata),
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.ops = &altera_sysid_ops,
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};
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